How To Fix CL063 - Error locking & &; internal error

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 063

• Message text: Error locking & &; internal error

What causes this issue?

An internal error occurred locking &v1&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL063 - Error locking & &; internal error ?

  The SAP error message CL063, which indicates "Error locking & &; internal error," typically arises in the context of object locking mechanisms within the SAP system. This error can occur when there is an issue with the locking of objects, which is essential for maintaining data integrity during concurrent access.
  Causes:
  
  Lock Table Overflow: The lock table may be full, preventing new locks from being created.
  Database Issues: There may be underlying database issues that are causing the locking mechanism to fail.
  System Performance: High system load or performance issues can lead to timeouts or failures in acquiring locks.
  Configuration Issues: Incorrect configuration settings related to locking mechanisms in the SAP system.
  Deadlocks: Situations where two or more processes are waiting for each other to release locks, leading to a deadlock scenario.
  
  Solutions:
  
  Check Lock Table: Use transaction code SM12 to check the lock entries. If the lock table is full, you may need to delete unnecessary locks or increase the size of the lock table.
  Monitor System Performance: Use transaction codes like SM50 or SM66 to monitor system performance and identify any processes that may be causing issues.
  Database Check: Ensure that the database is functioning correctly. Check for any database locks or issues that may be affecting the SAP system.
  Review Configuration: Check the configuration settings related to locking in the SAP system. Ensure that they are set correctly.
  Restart Processes: If a specific process is causing the issue, consider restarting it or, if necessary, restarting the application server.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM50: Monitor active processes.
  SM66: Monitor global processes.
  
  
  SAP Notes: Search for SAP Notes related to CL063 for any specific patches or updates that may resolve the issue.
  System Logs: Check system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.